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/*
* Copyright 2002-2012 Drew Noakes
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* More information about this project is available at:
*
* http://drewnoakes.com/code/exif/
* http://code.google.com/p/metadata-extractor/
*/
package com.drew.metadata.photoshop;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.TagDescriptor;
/**
* @author Drew Noakes http://drewnoakes.com
*/
public class PsdHeaderDescriptor extends TagDescriptor<PsdHeaderDirectory>
{
public PsdHeaderDescriptor(@NotNull PsdHeaderDirectory directory)
{
super(directory);
}
public String getDescription(int tagType)
{
switch (tagType) {
case PsdHeaderDirectory.TAG_CHANNEL_COUNT:
return getChannelCountDescription();
case PsdHeaderDirectory.TAG_BITS_PER_CHANNEL:
return getBitsPerChannelDescription();
case PsdHeaderDirectory.TAG_COLOR_MODE:
return getColorModeDescription();
case PsdHeaderDirectory.TAG_IMAGE_HEIGHT:
return getImageHeightDescription();
case PsdHeaderDirectory.TAG_IMAGE_WIDTH:
return getImageWidthDescription();
default:
return super.getDescription(tagType);
}
}
@Nullable
public String getChannelCountDescription()
{
try {
Integer value = _directory.getInt(PsdHeaderDirectory.TAG_CHANNEL_COUNT);
if (value == null)
return null;
return value + " channel" + (value == 1 ? "" : "s");
} catch (Exception e) {
return null;
}
}
@Nullable
public String getBitsPerChannelDescription()
{
try {
Integer value = _directory.getInt(PsdHeaderDirectory.TAG_BITS_PER_CHANNEL);
if (value == null)
return null;
return value + " bit" + (value == 1 ? "" : "s") + " per channel";
} catch (Exception e) {
return null;
}
}
@Nullable
public String getColorModeDescription()
{
// Bitmap = 0; Grayscale = 1; Indexed = 2; RGB = 3; CMYK = 4; Multichannel = 7; Duotone = 8; Lab = 9
try {
Integer value = _directory.getInt(PsdHeaderDirectory.TAG_COLOR_MODE);
if (value == null)
return null;
switch (value){
case 0: return "Bitmap";
case 1: return "Grayscale";
case 2: return "Indexed";
case 3: return "RGB";
case 4: return "CMYK";
case 7: return "Multichannel";
case 8: return "Duotone";
case 9: return "Lab";
default: return "Unknown color mode (" + value + ")";
}
} catch (Exception e) {
return null;
}
}
@Nullable
public String getImageHeightDescription()
{
try {
Integer value = _directory.getInt(PsdHeaderDirectory.TAG_IMAGE_HEIGHT);
if (value == null)
return null;
return value + " pixel" + (value == 1 ? "" : "s");
} catch (Exception e) {
return null;
}
}
@Nullable
public String getImageWidthDescription()
{
try {
Integer value = _directory.getInt(PsdHeaderDirectory.TAG_IMAGE_WIDTH);
if (value == null)
return null;
return value + " pixel" + (value == 1 ? "" : "s");
} catch (Exception e) {
return null;
}
}
}
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